Cache is not at posted coordinates. You will receive the coordinates upon completion of the Adventure Lab, "Changes: I Remember That." To play this Adventure Lab, you will need a smart phone with the Adventure Lab mobile app installed. The Adventure Lab mobile app is part of the Groundspeak ecosystem; this conveniently allows you to log in with your existing username and password used for your regular geocaching activities.
This 5 stage adventure lab will take you to various sites that have changed, for better or worse, over the decades. When you complete stage 5 you will be given the coordinates for this bonus cache. Find the adventure lab here https://adventurelab.page.link/UR9t Thanks for playing and stay safe!
I hope you enjoy the Adventure Lab and this park and grab bonus cache.